#qq {
	display: block;
	position: fixed;
	width: 55px;
	height: 67px;
	top: 55%;
	left: 50%;
	margin: -34px 0 0 520px;
	background: url(../images/qq.png) 0 -67px no-repeat;
}
#qq:hover {
	background-position: -55px -67px;
}
#qq.online {
	background-position: 0 0;
}
#qq.online:hover {
	background-position: -55px 0;
}